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Clues for the existence of two K-1(1270) resonances

AutorGeng, Li Sheng; Oset, Eulogi ; Roca, Luis; Oller, José Antonio
Palabras claveChiral perturbation-theory
Axial-vector mesons
Diffractive production
Q-region
[PACS] Meson-meson interactions (energy ≤ 10 GeV)
[PACS] Other strange mesons
Fecha de publicación22-ene-2007
EditorAmerican Physical Society
CitaciónPhysical Review D 75(1): 014017 (2007)
ResumenThe axial-vector meson K-1(1270) was studied within the chiral unitary approach, where it was shown that it has a two-pole structure. We reanalyze the high-statistics WA3 experiment K(-)p -> K(-)π(+)π(-)p at 63 GeV, which established the existence of both K-1(1270) and K-1(1400), and we show that it clearly favors our two-pole interpretation. We also reanalyze the traditional K-matrix interpretation of the WA3 data and find that the good fit of the data obtained there comes from large cancellations of terms of unclear physical interpretation.
Descripción13 pages, 7 figures.-- PACS nrs.: 13.75.Lb; 14.40.Ev.-- ISI Article Identifier: 000243896200047.-- ArXiv pre-print available at: http://arxiv.org/abs/hep-ph/0610217
Versión del editorhttp://dx.doi.org/10.1103/PhysRevD.75.014017
URIhttp://hdl.handle.net/10261/9124
DOI10.1103/PhysRevD.75.014017
ISSN1550-7998
E-ISSN1550-2368
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